Conversion of renin substrate tetradecapeptide to angiotensin II by rat MAB elastase-2.

Abstract:

:A new approach for the purification of rat mesenteric arterial bed (MAB) elastase-2 has been developed using the chromogenic substrates N-succinyl-Ala-Ala-Pro-Phe-p-nitroanilide and N-succinyl-Ala-Ala-Pro-Leu-p-nitroanilide to monitor the enzymatic activity during various stages of purification. The purified enzyme was evaluated in the presence of various inhibitors and confirmed to have angiotensin (Ang) II-forming ability. The active site-directed inhibitor acetyl-Ala-Ala-Pro-Leu-chloromethylketone (100 micromol x L(-1)), described for human pancreatic elastase-2, abolished the enzymatic activity, confirming that the enzyme is an elastase-2. Chymostatin (100 micromol x L(-1)), an inhibitor regarded as selective for chymases, also showed a remarkable inhibitory effect (94%), whereas captopril (100 micromol x L(-1)) had no effect at all on the Ang II-forming activity. The Ang II precursor renin substrate tetradecapeptide (RS-14P) was converted into Ang II by the rat MAB elastase-2 with the following kinetic constants: Km = 124 +/- 21 micromol x L(-1); Kcat = 629 min(-1); catalytic efficiency (Kcat /Km) = 5.1 min(-1) micro(mol/L)-1. In conclusion, the strategy for the purification of rat MAB elastase-2 with the chromogenic substrates proved to be simple, rapid, accurate, and highly reproducible; therefore, it can be reliably and conveniently used to routinely purify this enzyme. The kinetic parameters for the formation of Ang II from RS-14P by rat MAB elastase-2 emphasize differences in substrate specificity between this and other Ang II-forming enzymes.

authors

Santos CF,Greene AS,Salgado MC,Oliveira EB

doi

10.1139/y04-102

subject

Has Abstract

pub_date

2004-11-01 00:00:00

pages

1000-5

issue

11

eissn

0008-4212

issn

1205-7541

pii

y04-102

journal_volume

82

pub_type

杂志文章
  • Improved sensitivity of the mouse interstitial cell testosterone assay with the addition of forskolin.

    abstract::Modification of the mouse interstitial cell testosterone assay by the addition of 1.5 microM forskolin to the incubation medium has improved the sensitivity of this luteinizing hormone bioassay from approximately 100 to 3 pg/tube of NIH rLH RP-2. Luteinizing hormone can be clearly detected in 1 microL of serum from ra...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y92-116

    authors: Debertin WJ,Pomerantz DK

    更新日期:1992-06-01 00:00:00

  • Shivering thermogenesis during acute hypercapnia.

    abstract::The effects of acute hypercapnia on human thermoregulation during cold exposure were investigated by immersion of eight male subjects to the neck in a 15 degrees C water bath until their core temperatures dropped to 35 degrees C or until 1 h of immersion had elapsed. Air was inspired throughout each experiment, with t...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 临床试验,杂志文章

    doi:10.1139/y94-037

    authors: Lun V,Sun JC,Giesbrecht GG,Mekjavić IB

    更新日期:1994-03-01 00:00:00

  • Development of membrane conductance of chick skeletal muscle in culture.

    abstract::Resting membrane potentials and membrane conductances of chick skeletal muscle in culture were determined from the 3rd to the 10th day after plating. The effect of tetraethylammonium (TEA) and of replacement of potassium with caesium on these parameters was investigated. Resting membrane potential (Em) rises during my...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y80-100

    authors: Thomson CM,Dryden WF

    更新日期:1980-06-01 00:00:00

  • Blood pressure control and erythrocytosis in rats: theory and observations.

    abstract::We compared some of our latest experiments on blood pressure control and erythrocytosis in spontaneously hypertensive rats with Gaar's computer-simulated studies, which suggest that erythrocytosis is a key to understanding the hemodynamic changes in hypertension. We tested two of Gaar's several predictions: (i) periph...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y94-096

    authors: Gould AB,Goodman S,Swartz C

    更新日期:1994-06-01 00:00:00

  • Possible prevention by amlodipine of ventricular fibrillation related to brief ischemia episodes.

    abstract::Calcium antagonists may reduce propensity to ventricular fibrillation, by altering the balance between coronary blood flow and metabolic demand, and thus may substantially prolong time to occurrence of fibrillations. This delay in the onset of fibrillation should be sufficient to prevent sudden death in the case of tr...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:

    authors: Timour Q,Aupetit JF,Freysz M,Frassati D,Faucon G

    更新日期:1996-12-01 00:00:00

  • Effects of tamoxifen citrate and cycloheximide on estradiol induction of rat myometrial gap junctions.

    abstract::Longitudinal muscle of myometrial tissues from immature rats were examined by quantitative thin section electron microscopy for the presence of gap junctions after treatment with estradiol with and without tamoxifen, and cycloheximide for 1-6 days. Gap junctions were present between myometrial cells on days 4, 5, and ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y86-117

    authors: MacKenzie LW,Garfield RE

    更新日期:1986-06-01 00:00:00

  • Physical activity and body functionality: implications for obesity prevention and treatment.

    abstract::Physical activity promotes metabolic adaptations that improve body functionality and contribute to the prevention of some diseases. With respect to energy and fat balance, physical activity facilitates the equilibrium between energy intake and expenditure as well as between fat intake and fat oxidation. When combined ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章,评审

    doi:10.1139/y05-132

    authors: Tremblay A,Therrien F

    更新日期:2006-02-01 00:00:00

  • Synergistic ameliorative effects of sesame oil and alpha-lipoic acid against subacute diazinon toxicity in rats: hematological, biochemical, and antioxidant studies.

    abstract::Diazinon (DZN) is a common organophosphorus insecticide extensively used for agriculture and veterinary purposes. DZN toxicity is not limited to insects; it also induces harmful effects in mammals and birds. Our experiment evaluated the protective and antioxidant potential of sesame oil (SO) and (or) alpha-lipoic acid...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/cjpp-2015-0131

    authors: Abdel-Daim MM,Taha R,Ghazy EW,El-Sayed YS

    更新日期:2016-01-01 00:00:00

  • Statin treatment increases formation of carbon monoxide and bilirubin in mice: a novel mechanism of in vivo antioxidant protection.

    abstract::Heme oxygenase (HO) has a central role in cellular antioxidant defences and vascular protection, and it may mediate pleiotropic actions of drugs used in cardiovascular therapy. We investigated whether long-term use of statins upregulates HO activity and increases carbon monoxide (CO) and bilirubin levels in vivo. Adul...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y07-077

    authors: Muchova L,Wong RJ,Hsu M,Morioka I,Vitek L,Zelenka J,Schröder H,Stevenson DK

    更新日期:2007-08-01 00:00:00

  • Islet protective and insulin secretion property of Murraya koenigii and Ocimum tenuflorum in streptozotocin-induced diabetic mice.

    abstract::The present study investigates the antidiabetogenic effects of Murraya koenigii (L.) Spr. and Ocimum tenuflorum L. on streptozotocin-induced diabetic Swiss mice. Treatment with extracts of M. koenigii (chloroform; MKC) and O. tenuflorum (aqueous; OTA) resulted in proper glucose utilization with an increase in liver gl...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y11-133

    authors: Dusane MB,Joshi BN

    更新日期:2012-03-01 00:00:00

  • A tubule cell model for ifosfamide nephrotoxicity.

    abstract::Mechanisms leading to ifosfamide (IF)-induced renal damage have not been fully elucidated. Recent work suggests that localized renal tubular metabolism of IF and the production of the nephrotoxic chloroacetaldehyde may lead to nephrotoxicity. Presently no pharmacological method to reduce IF nephrotoxicity has been ide...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y05-036

    authors: Aleksa K,Halachmi N,Ito S,Koren G

    更新日期:2005-06-01 00:00:00

  • Role of nitric oxide on the vasorelaxant effect of atrial natriuretic peptide on rabbit aorta basal tone.

    abstract::The role of nitric oxide (NO) on the vasorelaxant effect of atrial natriuretic peptide (ANP) on the basal tone of rabbit aortic rings conditioned to angiotensin II (Ang II) was studied. ANP aortic relaxation and nitrite release were measured in the presence and absence of endothelium and a NO-synthase inhibitor. Ang I...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y02-130

    authors: Romano L,Coviello A,Jerez S,Peral de Bruno M

    更新日期:2002-10-01 00:00:00

  • Intracellular cyclic AMP concentration modulates gap junction permeability in parturient rat myometrium.

    abstract::We investigated whether cell-to-cell coupling between myometrial cells of parturient rats is influenced by intracellular adenosine 3',5'-cyclic monophosphate (cAMP) concentration. To evaluate the coupling, we measured input resistance (Ro) and injected Lucifer Yellow (LY) using microelectrode techniques. The intercell...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y92-045

    authors: Sakai N,Blennerhassett MG,Garfield RE

    更新日期:1992-03-01 00:00:00

  • Mepivacaine-induced contraction involves phosphorylation of extracellular signal-regulated kinase through activation of the lipoxygenase pathway in isolated rat aortic smooth muscle.

    abstract::Mepivacaine is an aminoamide local anesthetic with an intermediate duration that intrinsically produces vasoconstriction both in vivo and in vitro. This study investigated the arachidonic acid metabolic pathways involved in mepivacaine-induced contraction, and elucidated the associated cellular mechanism with a partic...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/cjpp-2012-0197

    authors: Lee HM,Ok SH,Sung HJ,Eun SY,Kim HJ,Lee SH,Kang S,Shin IW,Lee HK,Chung YK,Choi MJ,Bae SI,Sohn JT

    更新日期:2013-04-01 00:00:00

  • Attempts to alter the heterogeneous response to ANP in sodium-retaining caval dogs.

    abstract::Chronic caval dogs with ascites were identified as being natriuretic "responders" or "nonresponders" (delta UNaV less than 20 microequiv./min) following an infusion of atrial natriuretic peptide (ANP) (100 ng.kg-1.min-1). To learn more about the factors modulating tubular resistance to ANP, we attempted to convert res...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y92-120

    authors: Legault L,Cernacek P,Levy M

    更新日期:1992-06-01 00:00:00

  • Effects of modafinil on heat thermoregulatory responses in humans at rest.

    abstract::The effects of modafinil on heat thermoregulatory responses were studied in 10 male subjects submitted to a sweating test after taking 200 mg of modafinil or placebo. Sweating tests were performed in a hot climatic chamber (45 degrees C, relative humidity <15%, wind speed = 0.8 m x s(-1), duration 1.5 h). Body tempera...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 临床试验,杂志文章

    doi:10.1139/y02-092

    authors: Launay JC,Besnard Y,Guinet A,Bessard G,Raphel C,Savourey G

    更新日期:2002-08-01 00:00:00

  • A comparison of antigen-induced and calcium ionophore A23187 induced contraction of isolated guinea pig trachea.

    abstract::Ovalbumin (OA) and the calcium ionophore A23187 induced a dose-dependent contraction of guinea pig tracheal strips. The OA-induced contraction (of sensitized trachea) consisted of an initial peak concentration, maximal between 5 and 10 min, followed by a very gradual decline from the peak. On the other hand, A23187 in...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y81-158

    authors: Burka JF,Paterson NA

    更新日期:1981-10-01 00:00:00

  • Large venous compliance in carboxyhemoglobinemia and hemodilutional anemia.

    abstract::Anesthetized dogs were prepared for the measurement of compliance of the inferior vena cava by placement of a catheter for pressure measurement and a pair of ultrasonic dimension transducers for the measurement of transverse diameter. Measurements of compliance were made in a control state, after the induction of carb...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y86-092

    authors: Biro GP

    更新日期:1986-05-01 00:00:00

  • Pancreatic islet transplantation, but not intensive insulin therapy, corrects the pulmonary vascular complications of streptozotocin diabetes.

    abstract::We examined the effects of long-term streptozotocin (STZ) diabetes and its treatment by intensive insulin therapy (IIT) or pancreatic islet transplantation on pulmonary pressor and depressor responses and segmental resistance profiles in female Wistar-Furth rats. Pulmonary vascular reactivity was examined using isolat...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/cjpp-76-4-407

    authors: Russ RD,Tobin BW

    更新日期:1998-04-01 00:00:00

  • Role of folate in nonalcoholic fatty liver disease.

    abstract::Nonalcoholic fatty liver disease (NAFLD) is a spectrum of chronic liver conditions that are characterized by steatosis, inflammation, fibrosis, and liver injury. The global prevalence of NAFLD is rapidly increasing in proportion to the rising incidence of obesity and type 2 diabetes. Because NAFLD is a multifaceted di...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章,评审

    doi:10.1139/cjpp-2016-0681

    authors: Sid V,Siow YL,O K

    更新日期:2017-10-01 00:00:00

  • Resistance of hepatic glycogen to depletion in obese Zucker rats.

    abstract::Glycogen stores (liver and carcass) have been studied in lean and obese Zucker rats. The animals were submitted to one of three feeding conditions: ad libitum, a 48-h fast, or a 48-h fast and food ad libitum for 24 h, and to two environmental conditions, either thermoneutrality or an acute cold exposure (2 days at 4-7...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y91-127

    authors: Koubi H,Duchamp C,Géloën A,Fréminet A,Minaire Y

    更新日期:1991-06-01 00:00:00

  • Characterization of immunoreactive motilin from the rat small intestine.

    abstract::Immunocytochemistry, radioimmunoassay, chromatography, and biological assay using a rabbit isolated duodenal muscle strip preparation were used in attempting to characterize motilin from the rat small intestine. Several different antisera and monoclonal antibodies directed against natural porcine motilin were used. A ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y90-168

    authors: Vogel LB,Brown JC

    更新日期:1990-08-01 00:00:00

  • Effects of catecholamines injected into the septal area of the rat brain on natriuresis, kaliuresis and diuresis.

    abstract::Urinary output of Na+ and K+, and volume of urine have been studied in conscious, unrestrained, water-loaded male rats following the intraseptal injection of catecholamines. Natriuresis and kaliuresis increased after injecting noradrenaline (NA), the intensity being dose related. The dose-response curve suggests that ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y76-034

    authors: Camargo LA,Saad WA,Netto CR,Gentil CG,Antunes-Rodrigues J,Covian MR

    更新日期:1976-06-01 00:00:00

  • Implication of multiple signaling pathways in the regulation of angiotensin II induced enhanced expression of Giα proteins in vascular smooth muscle cells.

    abstract::We have previously shown that A10 vascular smooth muscle cells (VSMC) exposed to angiotensin II (Ang II) exhibited overexpression of Giα proteins. In the present study, we examined the involvement of different signaling pathways in regulating Ang II induced enhanced expression of Giα proteins in VSMC by using pharmaco...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y2012-042

    authors: Li Y,Anand-Srivastava MB

    更新日期:2012-08-01 00:00:00

  • Effect of 6-hydroxydopamine on brain and blood catecholamine, ammonia, and amino acid metabolism in rats subjected to high pressure oxygen induced convulsions.

    abstract::Effects of 6-hydroxydopamine (6-OHDA) on rat brain and blood adrenaline (A), noradrenaline (NA), ammonia (NH3), gamma-aminobutyric acid (GABA), and amino acid metabolism prior to and after high pressure oxygen (OHP) induced convulsions have been studied. 6-OHDA reduces GABA and glutamate (Glu) rior to OHP exposure in ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y78-051

    authors: Singh AK,Banister EW

    更新日期:1978-04-01 00:00:00

  • Effects of swimming training on tissue glycogen content in experimental thyrotoxic rats.

    abstract::Thyrotoxicosis, a condition in which there is an excessive amount of circulating thyroid hormones, leads to reduced glycogen content in different tissues. In this study we analyzed the effects of aerobic swimming training on liver, heart, and skeletal muscle glycogen content in experimentally induced thyrotoxicosis. W...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y2012-044

    authors: Ribeiro LF,Teixeira IP,Aparecido da Silva G,Dalia RA,Júnior MC,Bertolini NO,Rostom de Mello MA,Luciano E

    更新日期:2012-05-01 00:00:00

  • Potassium loss from hypoxic myocardium: influence of external K concentration.

    abstract::The influence of external potassium Ko and tetraethylammonium on the cellular K content of hypoxic myocardium was investigated. Perfused rabbit hearts were submitted to 60 min hypoxia in medium containing 5 mM K throughout or either low (1.5 mM) or high (10 mM) K during the last 20 min of hypoxia. Paced electrical act...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y87-138

    authors: Leblanc N,Ruiz-Ceretti E,Chartier D

    更新日期:1987-05-01 00:00:00

  • Effect of lithium chloride on ornithine decarboxylase activity in rat adrenal.

    abstract::The effects of lithium chloride on ornithine decarboxylase (ODC) activity were compared in the adrenal and kidney of control (saline treated) and prolactin-treated rats. ODC activity was decreased in kidney of both groups of animals, the magnitude of the effect of lithium in the hormone-treated group varying with the ...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y92-180

    authors: Strümpfer A,Hsiao J,Peng T,Richards J

    更新日期:1992-09-01 00:00:00

  • Tissue-specific concentration changes of estrone and estradiol during spontaneous and ACTH-induced parturition in sheep.

    abstract::Changes in estrogen production are considered important in the sequence of events leading to parturition. We sought tissue-specific changes in the concentration of unconjugated estrone (E1) and estradiol (E2) in intrauterine fetal (amnion, chorion) and maternal (endometrium, myometrium) tissues during normal pregnancy...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y87-026

    authors: Power SG,Challis JR

    更新日期:1987-02-01 00:00:00

  • A comparison of the dipsogenic responses of male and female rats to a variety of stimuli.

    abstract::Female rats subjected to 48 h of water deprivation drank more than similarly deprived males. There was no sexual difference in the dipsogenic responses to intracellular dehydration produced by intravenous hypertonic NaCl but females drank considerably more than males in response to the extracellular stimuli of hyperon...

    journal_title:Canadian journal of physiology and pharmacology

    pub_type: 杂志文章

    doi:10.1139/y80-179

    authors: Kaufman S

    更新日期:1980-10-01 00:00:00